Improved structure of fan for gasoline blower

Abstract

The invention discloses an improved structure of a fan for a gasoline blower. According to the structure, the peripheral face of a hub extends outwards to form front edges and rear edges of a plurality of fan blades, the front edges and the rear edges of the fan blades are connected in an end-to-end mode to form a concave plate, the radial cross section of the hub serves as the lowest point of the concave surface of the concave plate, a plurality of fan pieces distributed around the center of the hub in a radial rotation shape correspond to the fan blades and are arranged on the convex face of the concave plate, the radial cross section of each fan piece is an arc line which is bent in two different directions, the two portions, bent in the different directions, of the same arc line are in a concave arc shape relative to the windward face and a convex arc shape relative to the windward face, and an acute inclined angle is formed between the tail of each fan piece and the peripheral edge of the corresponding adjacent fan blade. The improved structure can not only reduce the deflection degree of outlet air flow of the fan pieces, but also reduce block and friction losses of inlet air flow of the fan pieces, and has the advantages of being low in noise and high in efficiency and improving wind pressure.

Description

technical field [0001] The invention relates to an improved structure of a fan, in particular to an improved structure of a fan blade, which is suitable for a gasoline blower. Background technique [0002] The gasoline blower is a gasoline-powered blower, which is usually used for cleaning gardens, roads and large venues, and can also be used for blowing sand before road maintenance. The gasoline blower is powered by a gasoline engine when it is working, and the blades of the fan rotate in the fan volute to generate wind force, and the generated wind force is blown out through the air outlet for operation. At present, the fan of a common gasoline blower includes a hub (1a) connected to the crankshaft. The outer peripheral surface of the hub extends outward to form a disc-shaped ring plate (2a). The ring plate is a funnel-shaped structure with a large opening. There are several fan blades (3a) evenly distributed on the top, and the fan blades are vertically fixed on the ring...

AI Technical Summary

Problems solved by technology

Due to the structural limitation of the traditional fan blade, when the air flow is thrown out due to the centrifugal effect, a vortex is easily formed on the periphery of the fan blade, causing air flow disorder, which makes the fan installed in the volute for actual use susceptible to certain problems. The blockage and friction loss caused by the large noise, low wind pressure, low wind efficiency, and low wind force when operating under the same power drive, so it is necessary to improve the structure of this traditional fan to obtain greater wind force and at the same time Reduce noise during operation

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